Max bielefeldt



UNITED STATES PATE T, OFFICE.

BLASTlNG-FUSE.

SPECIFICATION forming part of Letters Application filed April 29, 1896.

Patent No. 579,786, dated March so, 1897. statue. 589,566. (No model.)

To all whom it may concern:

Be it known that 1, MAX BIELEFELDT, doctor of philosophy, a subject ofthe German Emperor, residing at Wittenberg, in the King dom of Prussiaand German Empire, have invented certain new and useful Improvements inFuses Propagating the Inflammation without the Appearingof aFlamc and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

I A principal drawback to fuses or matchcords as at present employedconsists in that they burn witha flame, whereby fire-damp is liable" tobe exploded.

As additions of materials to thefuses for" the purpose of reducing theintensity of the flame afiord no guaranty for the safety against suchignition, quick-burning fuses have reeently been prepared which consistof a fusethread contained within igniting-materials. These fuse-threadscontain unprepared textile fibers-for instance, cotton, jute, &e.-whichare dusted over with readily-burning solid substances and pulverizedsubstances, such as ground tin ier, lycopodium seeds, resins,coinbustible salts, and oxygen carriers. These fuses, however, do notafford perfect security for a safe transmission of the combustion. Onthe other hand, perfectly safe fuses or matelfcords are obtainedaccording to the present invention by taking threads or cordsseed-oil,or the like.

consisting of ordinary fibers that have not been chemically altered orconsisting of nitrated fibers and impregnating the same with an oil andthen adding salts or compounds which produce a diminution of the flameor which entirely prevent its formation. It is necessary for thesecurity of such fuses to employ a drying-oil, such as linseed-oil,poppy- A further necessary conditionis that if it be desired tocompletely prevent the production of flame it is necessary to add tothis mixture salts or substances that are capable of preventing theformation of a flame. Suitable salts for this purpose are thosewhichhave a large proportion of water f crystallization, such .assulfate of magnesia, crystallized soda, alum, boratcs, ammonia salts,and sulfate of ammonia.

The fuse -threads prepared as above describedcan be manufactured .intofuses either by embedding the same in a combustible coming them aroundwith a covering of jute or the like, so that a fuse of the kind known asthe Biekford' fuse is. produced.

' For the production of the fuse it is not necessary to employ the saidthread as such in used in the same way as gunpowder for the manufactureof the fuses. The thread of the fuse can also be produced by preparing amixture of nitrated and non nitrated cellulose in the mannerabove'described. v For increasing the seeurityofiignitignmle'stillpreven'ting the production of a flame the addition of diazocompounds of thebenzol series and the naphthalene series has provedadvantageous.

pounds, have proved suitable. For suppressing flame in fuses orpreventing the production thereof it has proved advantageous to add tothe above substances glue or substances containing albumen or similarbodies. The glue and albumen substances can either be used together orseparately andeither in a solid or liquid condition. I

The kind of albuminous bodies and the form sequently also renders thefuse Waterproof.

The above-named substances can either be prepared separately or togetherfor -the for-' mation of fuses.

eertained the nature of this invention and in,- what manner the :sameisto be declare .that what I'claim is-. I

1; An improved manufacture of fuses and match-cords which consists'iniinprgnati-ng pound, such as gunpowdenor by merely windand then treatingthe same with oils and salts- Having now particularly described stats-jthe fuse, asnitrated cellulose granules can be In particulardiazobenzolsulfonic acid, as also its salts, the chromium and bromincomin which they are applied are immaterial. The i it is renderedimpervious to moisture and con- 1 a r l performed, I.

s sumac a fiber with a drying-oil and a salt having high percentage ofwater of crystallization with diazo compounds and with-albuminousbodies.

2. An improved manufactureof fuses and match-cords which consists inimpregnating a fiber suchtas guncotton, with a drying-oil and a 'salthaving high percentage of water of crystallization with diazo compoundsand a fiber, consisting of granulated guncotten,

with a drying-oil and a salt having high percentage of water ofcrystallization, with diazo compounds of the bensol series and withalbuminous bodies.

'5; An improved manufacture of fuses and match-cords, which consists inimpregnating a fiber, consisting of granulated gnncottou',

-witl1-a drying-oil and. a salt having a high percentage of water ofcrystallization, with diazo compounds of the benzol and naphthaleneseries and with albuminous bodies.

, 6. -Afuse composed of readily-burning material impregnated with adryingoil, such as linseed-oil, and treated with a substance operatingto suppress flame,,snch as sulfate of magnesia, substantially as setforth.

In testimony whereof I have afiixed mysignatur'e'in presence of twowitnesses MAX BIEL'EFELD'I,

Witnesses:

JOHN B. Jncicsos MAX WAGNER.

